package mattypserver.dyndns.org.oah;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URLEncoder;
import java.util.ArrayList;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;

import android.util.Log;


public class OAuthHttpClient {

	private ArrayList<NameValuePair> params;
	private ArrayList<NameValuePair> headers;
	private String url;
	private int responseCode;
	private String message;
	private String response;
	private String requestString;
	private OAuthHelper helper;

	public OAuthHttpClient(String url, OAuthHelper helper) {
		this.url = url;
		this.helper = helper;
		params = new ArrayList<NameValuePair>();
		headers = new ArrayList<NameValuePair>();
	}

	public void addHeader(String name, String value) {
		headers.add(new BasicNameValuePair(name, value));
	}

	public void addParam(String name, String value) {
		params.add(new BasicNameValuePair(name, value));
	}

	public void execute(RequestMethod method) throws Exception {
		switch (method) {
		case GET: {
			// add parameters
			String combinedParams = "";
			if (!params.isEmpty()) {
				combinedParams += "?";
				for (NameValuePair p : params) {
					String paramString = p.getName() + "="
							+ URLEncoder.encode(p.getValue(), "UTF8");
					if (combinedParams.length() > 1) {
						combinedParams += "&" + paramString;
					} else {
						combinedParams += paramString;
					}
				}
			}
			HttpGet request = new HttpGet(url + combinedParams);
			// add headers
			for (NameValuePair h : headers) {
				request.addHeader(h.getName(), h.getValue());
			}
			helper.getOAuthConsumer().sign(request);
			setRequestString(request.toString());
			executeRequest(request);
			break;
		}
		case POST: {
			HttpPost request = new HttpPost(url);
			// add headers
			for (NameValuePair h : headers) {
				request.addHeader(h.getName(), h.getValue());
			}
			if (!params.isEmpty()) {
				request.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
			}
			helper.getOAuthConsumer().sign(request);
			setRequestString(request.toString());
			executeRequest(request);
			break;
		}
		}
	}

	private void executeRequest(HttpUriRequest request){
		HttpClient client = new DefaultHttpClient();
		HttpResponse httpResponse;
		try {
			httpResponse = client.execute(request);
			responseCode = httpResponse.getStatusLine().getStatusCode();
			Log.d("executeRequest", "Response Code: [" + getResponseCode()
					+ "]");
			message = httpResponse.getStatusLine().getReasonPhrase();
			HttpEntity entity = httpResponse.getEntity();
			if (entity != null) {
				InputStream instream = entity.getContent();
				response = convertStreamToString(instream);
				// Closing the input stream will trigger connection release
				instream.close();
			}
		}catch(ClientProtocolException e){
			client.getConnectionManager().shutdown();
			e.printStackTrace();
			Log.e("executeRequest", e.toString());
		}catch(IOException e){
			client.getConnectionManager().shutdown();
			e.printStackTrace();
			Log.e("executeRequest", e.toString());
		}
	}

	private static String convertStreamToString(InputStream is){
		BufferedReader reader = new BufferedReader(new InputStreamReader(is));
		StringBuilder sb = new StringBuilder();
		String line = null;
		try {
			while ((line = reader.readLine()) != null) {
				sb.append(line + "\n");
			}
		} catch (IOException e) {
			e.printStackTrace();
			Log.e("executeRequest", e.toString());
		} finally {
			try {
				is.close();
			} catch (IOException e) {
				e.printStackTrace();
				Log.e("executeRequest", e.toString());
			}
		}
		return sb.toString();
	}

	public String getErrorMessage() {
		return message;
	}

	public String getResponse() {
		return response;
	}

	public int getResponseCode() {
		return responseCode;
	}

	public String getRequestString() {
		return requestString;
	}

	public void setRequestString(String requestString) {
		this.requestString = requestString;
	}

	public OAuthHelper getHelper() {
		return helper;
	}

	public void setHelper(OAuthHelper helper) {
		this.helper = helper;
	}

}
